Fixed signal tree and added progress bar in besim

src/bedit_gui/controllers/simulation_plot_controller.py

@@ -15,6 +15,14 @@ from bedit_gui.views.simulation_window import SimulationWindow
 logger = get_logger(__name__)
 
 
+def _signal_tree_parts(signal: str) -> list[str]:
+    if signal.startswith("der(") and signal.endswith(")"):
+        parts = signal[4:-1].split(".")
+        if len(parts) > 1:
+            return [*parts[:-1], f"der({parts[-1]})"]
+    return signal.split(".")
+
+
 class SimulationPlotController(QObject):
     def __init__(self, window: SimulationWindow, files: SimulationFileController) -> None:
         super().__init__(window)
@@ -129,7 +137,7 @@ class SimulationPlotController(QObject):
             nodes: dict[tuple[str, ...], QTreeWidgetItem] = {}
             for signal in signals:
                 parent = tree.invisibleRootItem()
-                parts = signal.split(".")
+                parts = _signal_tree_parts(signal)
                 for depth, part in enumerate(parts, start=1):
                     path = tuple(parts[:depth])
                     item = nodes.get(path)